Gas cut-off for bunsen tubes.



No. 799,579. PATENTED SEPT. 12, 1905.

W. S STAPLEY. v GAS GUT-OFF FOR BUNSEN TUBES.

APPLICATION FILED MAY 25, 1905.

wiTNESSESi lNVENTOR 7fl -r 3 )ja/ A TORNEY ANDREW. a ennui 00..FMOYO-LITNOGRAPHER$ WASHNGYDN, 0v c.

UNITED STATES PATENT OFFICE.

BRIDGEPORT BRASS COMPANY, OF BRIDGEPORT, CORPORATION OF CONNECTICUT.

CONNECTICUT, A

GAS CUT-OFF FOR BUNSEN TUBES.

Specification of Letters Patent.

Patented Sept. 12, 1905.

Application filed May 25, 1905. Berial No. 262,157.

To all. whom it may cancer a specification.

This invention has for its object to produce a gas cut-01f for Bunsentubes which shall consist of two parts only, that may be struck out andformed from sheet metal at trifling expense, which will regulate thepressure as required, but will only affect the pressure at the point ofdelivery, and which will be perfectly gas-tight at all times.

It is of course well understood that the efiiciency of a Bunsen burnerdepends rather upon the pressure at which gas is delivered than on thequantity of gas and that the main pressure varies greatly even under thebest conditions, so that in mantle-burners as ordinarily constructed thequantity of gas that passes to the burner is very irregular and at timesmuch greater than can be consumed. The result is a deposit of carbonupon the mantle, which quickly impairs the incandescence of the mantleand not infrequently entirely ruins it. The present invention enablesthe user to regulate with the greatest ease the pressure at the burnerin accordance with the pressure of the main, and thus prevent thedeposit of carbon upon the mantle, at the same time giving the bestpossible result in incandescence of the mantle and effecting a greatsavingin the consumption of gas. a

With theseand other objects in view I have devised the novel gascut-ofi? which I will now describe, referring to theaccompanyingdrawings, forming a part of this specification, and usingreference characters to indicate the several parts.

Figure 1 is a longitudinal section, on an enlarged scale, of aBunsentube and base, illustrating the application thereto of my novel cut-oflFig. 2, a transverse section on the line 2 2 in Fig. 1 looking down;Fig. 3, a transverse section on the line 3 3 in Fig. 1 looking up; andFig. 4 is a detail sectional View, on a still larger scale, of thecut-off on the line 1 1 in Fig. 2.

1O denotes a Bunsen tube having the usual air-openings 11, and 12 thebase, having an opening 13 for the passage of gas. The base and tube areprovided with corresponding external and internal screw-threads, bywhich they are secured together.

14 denotes an internal circumferential rib below the air-openings, and15 a disk which rests against the rib and is shown as provided with aradial lug 16, which engages an opening 17 in the tube and holds thedisk against rotation, but leaves it readily removable by detaching thetube from the base. This disk is provided with an eccentrically-placedinverted outer cup 18, and the bottom of the cup is provided with agas-opening 19, which is concentric both with the Bunsen tube and withgas-opening 13 in the base. Upon the under side of the disk andsurrounding the base of the cup is a rib 20.

2-1 denotes an inner cup carried by a plate 22, which fits closelywithin outer cup 18, the outer face of cup 21 resting closely againstthe bottom of cup 18. The bottom of cup 21 is provided with a relativelylarge gas-open ing 23 and a relatively small gas-opening 24, either ofwhich is adapted to be placed partly or wholly in alinement withgas-opening 19 in cup 18 by oscillation of the plate, which is providedwith a finger-piece 25, extending through a slot 26 in the Bunsentubejust above the base. By placing the inner and outer cups eccentricto the Bunsen tube and the base and providing the outer cup with agas-opening concentric with the Bunsen tube and base and the inner cupwith a gas opening or openings adapted to be placed in alinementtherewith when the inner cup is oscillated I insure a central straightdelivery of the gas to the Bunsen tube at all times. This preventsspiral movement of the current of gas and its being thrown against theside of the tube, thus efiecting a true mixture of gas and air in thetube and perfect combustion at all times. This feature of constructionis of especial importance when the gaspressure is low, as it whollyprevents waving, fluttering, and rising and falling of the flame. Uponthe under side of plate 22 and surrounding the base of the cup is a rib27, which engages the base closely and prevents the passage of gasoutward around the cup. Rib 20 upon disk 15 engages the top of plate 22and makes a gas-seal between said plates, eflectually preventing thepassage of gas and also permitting suflicient spring of the disk tocompensate for slight variations in the parts, it be ing practicallyimpossible in the manufacture of such parts to prevent slightvariations, as a thousandth of an inch, more or less. I find in practicethat the ribs upon the plate and disk make perfect gas-seals between thebase and the plate and between the plate and the disk, the spring of thedisk amply compensating for the slight but inevitable variations in theparts.

The gas-opening 19 in cup 18 is the point of supply to the Bunsen tube.The cutting off and regulation of the pressure is efiected byoscillation of the inner cup by means of the finger-piece. IV hen theinner cup is oscillated to a position that will place gas-openings 23and 24 in the inner cup on opposite sides of gas-opening 19 in the outeron p, the supply of gas will be wholly cut ofi. By moving thelinger-piece in one direction the relatively small gas-opening 24 in theinner cup will be moved partly or wholly into alinement with gas-opening19, and by moving the finger-piece in the opposite direction therelatively large gas-opening 23 in the inner cup will be moved partly orwholly into alinement with the gas-opening 19 in the outer cup. I thusprovide for a regulation of pressure adapted to any possible variationin the main pressure and giving the best possible results inincandescenee of a mantle.

Having thus described my invention, I elaim 1. A gas cut-off comprisinga disk having an eccentrically-placed inverted cup with a gas-openingand an oscillating plate carrying a cup provided with a gas-opening andfitting closely within said other cup.

2. A gas cut-off comprising a disk having an eccentrically placedinverted outer cup with a gas-opening and an inner cup adapted tooscillate within the outer cup and having a relatively large and arelatively small gasopening, either of which is adapted to be placedwholly or partly in alinement with the opening in the outer cup.

3. A gas cut-oflf comprising a disk having an eccentrically-placcdinverted outer cup with a gas'opening and a rib surrounding the base ofthe cup, and a plate which is engaged by the rib and carries an innercup adapted to oscillate within the outer cup and provided withrelatively large and small gas-openings adapted to register with theopening in the outer cup.

4. In a device of the character described the combination with a Bunsentube and a base, of a disk having an eccentrically-placed inverted outercup with a gas-opening and an inner cup adapted to oscillate within theouter cup and having relatively large and small gasopenings either ofwhich is adapted to be placed either partly or wholly in alinement withthe opening in the outer cup.

5. In a device of the character described the combination with a Bunsentube and a base having a gas-opening, of a disk having aneccentrically-placed inverted outer cup with a gasropening concentricwith the tube and a rib surrounding the base of the cup, an inner cupadapted to oscillate within the outer cup and having relatively largeand small gas-openings, and a plate by which the inner cup is carriedand which is engaged by the rib and is provided with a rib surroundingthe cup which engages the base.

6. In a device of the character described the combination with a Bunsentube having an internal rib and a base which is engaged by the tube, ofa disk engaging the rib, means for retaining said disk against rotation,an eccentrically-plaeed inverted outer cup carried by said disk andprovided with a gasopening, concentric with the tube, an inner cupadapted to oscillate within the outer cup and having relatively largeand small gas-openings and a plate by which the inner cup is carried andwhich is provided with a finger-piece.

7. In a device of the character described the combination with a Bunsentube having an internal rib, below the rib an opening and opposite tosaid opening a slot and a base which is engaged by the tube, of a diskengaging the rib and having a lug engaging the opening by which the diskis held against rotation, an eceentrically-placed inverted outer cupprovided with a gas-opening which is carried by the disk, an inner cupadapted to oscillate within the outer cup and having relatively largeand small gas-openings, and a plate by which the inner cup is carriedand which is provided with a linger-piece extending through the slot inthe tube.

8. In a device of the character described the combination with a Bunsentube and a base, of a disk having an eccentrieally-placed outer cup witha gas-opening and a rib on its under side surrounding the cup, anoscillating plate which is engaged by the rib and has on its under sidea rib engaging the base, said ribs makinggas-seals between the platesand the base and an inner cup carried by the plate which lies closelywithin the outer cup and is provided with relatively large and smallgasopenings either of which is adapted to partly or wholly register withthe gas-opening in the outer cup.

In testimony whereof I atfix my signature in presence of two witnesses.

IVILLIAM S. STAPLEY.

Witnesses:

GEORGE E. SoMnRs, GEORGE W. BALDWIN.

IIO

